bit density

Another wrinkle occurs depending on whether surface bit densities are constant.

Neither the drive itself, nor the controller logic, nor the physical bit density was changed.

This is not the case with other schemes such as using constant bit density with a CAV spin rate.

Improvement of data transfer rate performance is correlated to the areal density only by increasing a track's linear surface bit density (sectors per track).

Technically, reformatting a cartridge means increasing its track density (only), as the linear bit density is limited by the tape coating.

For many older systems that recorded at a low linear bit density, the bit density of the recording could be determined.

A later 'JB' type cartridge will carry 1TB since its better coating also permits a higher linear bit density.

When the bit density is constant, outside tracks have more bits than inside tracks and is generally combined with a CLV spin rate.

Later optical formats such as the audio CD also employ CLV to maintain both a constant data rate and a constant bit density.

Because each sector still contains the same number of bytes, the outer sectors have lower bit density than the inner ones, which is an inefficient use of the magnetic surface.

Dramatic improvements in magnetic detection capabilities, based on the development of spintronic magnetoresistive-sensing materials and devices, allow the use of much smaller magnetic domains to provide far higher bit densities.

As a consequence, the areal bit densities of flash memory are much higher than those of FeRAM, and thus the cost per bit of flash memory is orders of magnitude lower than that of FeRAM.

(Note that the Yellow Book standard for CD-ROM only specifies a high-level data format and refers to the Red Book for all physical format and low-level code details, such as track pitch, linear bit density, and bitstream encoding.)

Micromation's first major product was an S-100 bus floppy disk controller card called the "Doubler", named for its ability to record information on 8" floppy diskettes at twice the bit density previously available, allowing users to store approximately 256 kilobytes of data on each side of an 8" diskette instead of 128 kilobytes.